Suzuki dt25c loosing power

[eagldhd00]

I have a 97 dt25c that I inherited upon my father in laws death. I've never been in the boat prior to know how long the issue has been. The issue is when I put the boat on the water it will idle and run ok at low rpm. Once I try to go and put it under a load it feels and sounds like one of the cylinders cuts out. If I go back to idle it sounds to kick back in. I've cleaned the carbs to the best of my knowledge, replaced spark plugs, fuel tank, and fuel line with primer bulb. I have 120lbs of compression on all 3 cylinders. I'm at a loss.

 

[William01]

Suzuki 2-65HP - Two-Stroke 1992-1999 Shop Repair Manual - Jet Drives included.

Suzuki 2-65HP - Two-Stroke 1992-1999 Shop Repair Manual Includes Jet Drives Manual covers the following models: 1992-1999 SUZUKI DT15 1992-1999 SUZUKI DT2 1992-1999 SUZUKI DT2.2 1992-1999 SUZUKI DT25 1992-1999 SUZUKI DT30 1992-1999 SUZUKI DT4 1992-1999 SUZUKI DT40 1992-1999 SUZUKI DT5 1992-1999..

www.selffixer.com

A good place to start is a genuine Suzuki service manual. It will have specifications and troubleshooting for your engine. If you think you’re loosing spark then start there. While at idle pull one plug wire at a time and see if that makes a difference, with a helper (if needed) repeat the above procedure when the engine is bucking. Wear thick gloves, you will likely get zapped if you try with bare hands.

 

[racerone]

You replaced the water pump impeller ?----Does spark jump a gap of 3/8" on each lead ?----Perhaps run with a timing light to see if one of the cylinders is loosing spark.---Did motor sit for a long time with fuel in the carburetors?